A.O. Smith RPV series Installation Instructions And Use & Care Manual page 16

To toggle between Fahrenheit and
Celsius,
1. Press and hold the DOWN button
for five seconds. See Figure 7.
2. The °F or °C LED will illuminate,
and the 7-segment LED will
display the temperature set point
in the appropriate units.
16 • Electric Tankless Water Heater
Figure 7 .
Two and Four Chamber Models Only:
En on
ENTER
°F
°F
°C
°F or °C